FSC1 MCB

Q: What is the difference between an MCB and an MCCB?

An MCB (miniature circuit breaker) is a DIN-rail device for final circuits, typically rated up to 125 A with a fixed trip curve. An MCCB (moulded case circuit breaker) is a larger device for main and sub-main distribution, usually 16 A to 1600 A, with adjustable thermal and magnetic settings and a higher breaking capacity. Use an MCB for branch circuits and an MCCB where you need adjustability or higher fault ratings.

Q: How do I choose between a Type B, C and D trip curve?

Type B trips between 3 and 5 times rated current and suits resistive loads such as lighting and heaters. Type C trips between 5 and 10 times and is the general-purpose choice for socket circuits and mixed loads. Type D trips between 10 and 20 times and is used for loads with high inrush, such as motors, transformers and large LED drivers.

Q: What does 6 kA breaking capacity mean in practice?

It is the maximum prospective short-circuit current the device can safely interrupt. 6 kA covers most domestic and light commercial installations. Where the transformer is close and the fault level is higher, specify 10 kA devices so the breaker still clears the fault without damage.

Q: Can these devices be supplied with your own brand?

Yes. OEM branding, buyer-specific labels, custom carton print and private-model numbering can be arranged on qualified order volumes.

About the FSC1 MCB

The FSC1 MCB is part of the ELEHPD MCB range. FSC1 (ERC1 model) Series high breaking capacity miniature circuit breaker, it is mainly suitable for illumination distribution, commercial, high building, housing, etc. It is of pleasing out-look, light weight, reliable performance, high breaking capacity, triping quickly. Its body and case are adopted with high fire-resistant and shockproof plastics. The product, with long life, is mainly used in AC50/60Hz, rated voltage 230/400V, rated current 63A circuit for overload and short-circuit protection as well as for unfrequent on and off switching electric equipment and lighting circuit in normal case. FSC1 Series high breaking capacity miniature circuit breaker have a outstanding characteristic: its breaking capacity fully is 6KA and 10KA. ELEHPD manufactures and exports low voltage electrical products from Yueqing, Zhejiang, China, supplying distributors, panel builders, M&E contractors and OEM buyers worldwide.

Typical applications

Consumer units and distribution boards in residential buildings
Commercial and retail fit-outs where selective protection is required
Industrial control panels and machine-builder assemblies
Solar PV, EV charger and battery-storage sub-circuits
OEM equipment where a DIN-rail protective device is specified

How to specify the right MCB

Match the rated current to the circuit design current, then check the cable ampacity
Pick the trip curve to the load: B for resistive/lighting, C for general mixed loads, D for motors and transformers
Confirm the breaking capacity meets the prospective short-circuit current at the point of installation
Verify the pole configuration (1P, 1P+N, 2P, 3P, 3P+N, 4P) against the system earthing arrangement

Specifications

FSC1 (ERC1 model) Series high breaking capacity miniature circuit breaker, it is mainly
suitable for illumination distribution, commercial, high building, housing, etc. It
is of pleasing out-look, light weight, reliable performance, high breaking capacity,
triping quickly. Its body and case are adopted with high fire-resistant and shockproof plastics. The product, with long life, is mainly used in AC50/60Hz, rated voltage 230/400V, rated current 63A circuit for overload and short-circuit protection as well as for unfrequent on and off switching electric equipment and lighting circuit in normal case.
FSC1 Series high breaking capacity miniature circuit breaker have a outstanding
characteristic: its breaking capacity fully is 6KA and 10KA.

Short Circuit Breaking Capacity

Rated operating voltage (V)	Pole number(P)	Rated current(A)	Rated short circuit breaking capacity (A)
230	1,2,3	1,2,3,5,6,10,16 20,25,32,40	6000A 10000A	0.65~0.70
230/400	1,2,3	0.65~0.70
400	2,3,4	0.65~0.70
230	1,2,3	0.75~0.80
230/400	1,2,3	50,63	6000A 10000A	0.75~0.80
400	2,3,4	0.75~0.80

Notes: (1) Mechanical life: 20000 (2)Resistance heat characteristic: 2 (temperature 550C,relative to moisture 95% ) (3) Connect with terminal of clip and hoop, can be connected for section no more than 25mm2

Time and Current Operating Character

Test	Model	Test current	Starting habitus	Time summit for release or no	Estimation result	Note
a		1.13In	Cold state		Non-release
b		1.45In	Immediacy test		Non-release
c		2.55In	Cold state		Release
d	B C	3In 5In	Cold state		Release	Current connected through splice auxiliary switching
e	B C	5In 10In	Cold state	t<0.1s	Release	Current connected through splice auxiliary switching

Terminology cold-state is no loading with temperature of base and stated before testing.

Handle Color

Frequently asked questions about the FSC1 MCB

What is the difference between an MCB and an MCCB?

An MCB (miniature circuit breaker) is a DIN-rail device for final circuits, typically rated up to 125 A with a fixed trip curve. An MCCB (moulded case circuit breaker) is a larger device for main and sub-main distribution, usually 16 A to 1600 A, with adjustable thermal and magnetic settings and a higher breaking capacity. Use an MCB for branch circuits and an MCCB where you need adjustability or higher fault ratings.

How do I choose between a Type B, C and D trip curve?

Type B trips between 3 and 5 times rated current and suits resistive loads such as lighting and heaters. Type C trips between 5 and 10 times and is the general-purpose choice for socket circuits and mixed loads. Type D trips between 10 and 20 times and is used for loads with high inrush, such as motors, transformers and large LED drivers.

What does 6 kA breaking capacity mean in practice?

It is the maximum prospective short-circuit current the device can safely interrupt. 6 kA covers most domestic and light commercial installations. Where the transformer is close and the fault level is higher, specify 10 kA devices so the breaker still clears the fault without damage.

Can these devices be supplied with your own brand?

Yes. OEM branding, buyer-specific labels, custom carton print and private-model numbering can be arranged on qualified order volumes.